Goodix Fingerprint device is not a modem

commit 4d8654e81db7346f915eca9f1aff18f385cab621 upstream.

The CDC ACM driver is false matching the Goodix Fingerprint device
against the USB_CDC_ACM_PROTO_AT_V25TER.

The Goodix Fingerprint device is a biometrics sensor that should be
handled in user-space. libfprint has some support for Goodix
fingerprint sensors, although not for this particular one. It is
possible that the vendor allocates a PID per OEM (Lenovo, Dell etc).
If this happens to be the case then more devices from the same vendor
could potentially match the ACM modem module table.

Signed-off-by: Yorick de Wid <ydewid@gmail.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210213144901.53199-1-ydewid@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index e5ee349a5382b3c7fed91842e29dd71f9f036d29..53d2f02e18a32b6a77e4a25f67a930c840b4183b 100644 (file)
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1928,6 +1928,11 @@ static const struct usb_device_id acm_ids[] = {
        .driver_info = SEND_ZERO_PACKET,
        },
 
+       /* Exclude Goodix Fingerprint Reader */
+       { USB_DEVICE(0x27c6, 0x5395),
+       .driver_info = IGNORE_DEVICE,
+       },
+
        /* control interfaces without any protocol set */
        { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
                USB_CDC_PROTO_NONE) },